/*---------------------------------------------------------------------------*\
  =========                 |
  \\      /  F ield         | foam-extend: Open Source CFD
   \\    /   O peration     | Version:     4.1
    \\  /    A nd           | Web:         http://www.foam-extend.org
     \\/     M anipulation  | For copyright notice see file Copyright
-------------------------------------------------------------------------------
License
	This file is part of foam-extend.

	foam-extend is free software: you can redistribute it and/or modify it
	under the terms of the GNU General Public License as published by the
	Free Software Foundation, either version 3 of the License, or (at your
	option) any later version.

	foam-extend is distributed in the hope that it will be useful, but
	WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
	General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with foam-extend.  If not, see <http://www.gnu.org/licenses/>.

\*---------------------------------------------------------------------------*/

#include "wordRe.H"
#include "IOstreams.H"
#include "InfoProxy.H"

// * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //

const Foam::wordRe Foam::wordRe::null;


// * * * * * * * * * * * * * * * * Constructors  * * * * * * * * * * * * * * //

Foam::wordRe::wordRe(Istream& is)
:
	word(),
	re_(nullptr)
{
	is >> *this;
}


// * * * * * * * * * * * * * * * IOstream Operators  * * * * * * * * * * * * //

Foam::Istream& Foam::operator>>(Istream& is, wordRe& w)
{
	token t(is);

	if (!t.good())
	{
		is.setBad();
		return is;
	}

	if (t.isWord())
	{
		w = t.wordToken();
	}
	else if (t.isString())
	{
		// Auto-tests for regular expression
		w = t.stringToken();

		// flag empty strings as an error
		if (w.empty())
		{
			is.setBad();
			FatalIOErrorIn("operator>>(Istream&, wordRe&)", is)
				<< "empty word/expression "
				<< exit(FatalIOError);
			return is;
		}
	}
	else
	{
		is.setBad();
		FatalIOErrorIn("operator>>(Istream&, wordRe&)", is)
			<< "wrong token type - expected word or string, found "
			<< t.info()
			<< exit(FatalIOError);

		return is;
	}

	// Check state of IOstream
	is.check("Istream& operator>>(Istream&, wordRe&)");

	return is;
}


Foam::Ostream& Foam::operator<<(Ostream& os, const wordRe& w)
{
	os.writeQuoted(w, w.isPattern());
	os.check("Ostream& operator<<(Ostream&, const wordRe&)");
	return os;
}


Foam::Ostream& Foam::wordRe::info(Ostream& os) const
{
	if (isPattern())
	{
		os  << "wordRe(regex) " << *this;
	}
	else
	{
		os  << "wordRe(plain) \"" << *this << '"';
	}
	os.flush();

	return os;
}


// ************************************************************************* //
